Acnodes and Cusps on Landau Curves
- 1 September 1961
- journal article
- Published by AIP Publishing in Journal of Mathematical Physics
- Vol. 2 (5) , 656-663
- https://doi.org/10.1063/1.1703752
Abstract
It is shown that the Landau curve for a reduced sixth-order diagram can acquire acnodes and real cusps as the masses are varied. They are associated with complex singularities that under certain conditions are in the physical sheet and cause a breakdown of the Mandelstam representation. The problem of obtaining general criteria for acnodes and cusps is discussed.This publication has 12 references indexed in Scilit:
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